Michael Marshall, Editor Emeritus of UPI explains how progressives routinely ignore the numerous benefits of marriage between a man and a woman for child welfare.  Instead, they focus on whatever makes the two partners of whatever type happy.
Children are the losers in this new paradigm.
Resources mentioned in the video:
International Federation for Family Development:   https://iffd.org/
Family Research Council:   https://www.frc.org/
Heritage Foundation:   https://www.heritage.org/